// Simple SQLite database wrapper
// In production, use better-sqlite3 or similar

const Database = require('better-sqlite3');
const db = new Database('clouddisk.db');

// Initialize tables
db.exec(`
  CREATE TABLE IF NOT EXISTS users (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    username TEXT UNIQUE NOT NULL,
    password_hash TEXT NOT NULL,
    email TEXT,
    storage_used INTEGER DEFAULT 0,
    storage_limit INTEGER DEFAULT 10737418240,
    created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
    updated_at DATETIME DEFAULT CURRENT_TIMESTAMP
  );
  
  CREATE TABLE IF NOT EXISTS files (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    user_id INTEGER NOT NULL,
    parent_id INTEGER,
    name TEXT NOT NULL,
    type TEXT,
    size INTEGER DEFAULT 0,
    path TEXT,
    hash TEXT,
    is_folder INTEGER DEFAULT 0,
    created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
    updated_at DATETIME DEFAULT CURRENT_TIMESTAMP,
    deleted_at DATETIME,
    FOREIGN KEY (user_id) REFERENCES users(id),
    FOREIGN KEY (parent_id) REFERENCES files(id)
  );
  
  CREATE TABLE IF NOT EXISTS shares (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    file_id INTEGER NOT NULL,
    share_token TEXT UNIQUE NOT NULL,
    password TEXT,
    expires_at DATETIME,
    view_count INTEGER DEFAULT 0,
    created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (file_id) REFERENCES files(id)
  );
  
  CREATE TABLE IF NOT EXISTS sync_logs (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    user_id INTEGER NOT NULL,
    file_id INTEGER,
    action TEXT,
    status TEXT,
    created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (user_id) REFERENCES users(id)
  );
`);

module.exports = db;

// Sync tables (for reference - would be in migration in production)
db.exec(`
  CREATE TABLE IF NOT EXISTS sync_status (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    user_id INTEGER NOT NULL,
    last_sync_time DATETIME,
    status TEXT DEFAULT 'idle',
    total_files INTEGER DEFAULT 0,
    synced_files INTEGER DEFAULT 0,
    FOREIGN KEY (user_id) REFERENCES users(id)
  );
`);